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Question

 If the perimeter of each face of a cube is 32 cm, find its lateral surface area. Note that four faces which meet the base of a cube are called its lateral faces.


Solution

Perimeter of each face of a cube = 32 cm

 Length of edge = 324=8 cm

and lateral surface area of the cube

=4×(side)2=4×8×8=256 cm2


Mathematics
RD Sharma
Standard IX

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